Gelber Klang. 1964. Watercolor over India ink drawing. Signed in lower right. Verso dated and titled. On firm paper by Schöllershammer (with blindstamp). 62.6 x 44 cm (24.6 x 17.3 in) , the full sheet.
´The work is registered at the archive of the Karl and Emy Schmidt-Rottluff Foundation, Berlin.
PROVENANCE: Private collection Germany (obtained as present from the artist; since then family property).